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32ea28b6b1c1b22837add271f532896a7511a020
gimp/app/file/file-open.c
Michael Natterer 32ea28b6b1 app, libgimp, libgimpbase: plug-in and PDB protocol refactoring part two 
- Change the wire protocol's GPProcInstall to transmit the entire
  information needed for constructing all GParamSpecs we use, don't
  use GimpPDBArgType in GPProcInstall but an enum private to the wire
  protocol plus the GParamSpec's GType name. Bump the wire protocol
  version.

- Add gimpgpparamspecs.[ch] in both app/plug-in/ and libgimp/ which
  take care of converting between GPParamDef and GParamSpec. They
  share code as far as possible.

- Change pluginrc writing and parsing to re-use GPParamDef and the
  utility functions from gimpgpparamspecs.

- Remove gimp_pdb_compat_param_spec() from app/pdb/gimp-pdb-compat.[ch],
  the entire core uses proper GParamSpecs from the wire protocol now,
  the whole file will follow down the drain once we use a GValue
  representation on the wire too.

- In gimp_plug_in_handle_proc_install(), change the "run-mode"
  parameter to a GParamSpecEnum(GIMP_TYPE_RUN_MODE) (if it is not
  already an enum). and change all places in app/ to treat it as an
  enum value.

- plug-ins: fix cml-explorer to register correctly, a typo in
  "run-mode" was never noticed until now.

- Add gimpgpcompat.[ch] in libgimp to deal with all the transforms
  between old-style wire communication and using GParamSpec and
  GValue, it contains some functions that are subject to change or
  even removal in the next steps.

- Change the libgimp GimpProcedure and GimpPlugIn in many ways to be
  able to actually install procedures the new way.

- plug-ins: change goat-exercise to completely use the new GimpPlugIn
  and GimpProcedure API, look here to see how plug-ins will look in
  the future, of course subject to change until this is finished.

- Next: changing GPParam to transmit all information about a GValue.
2019-07-28 17:34:40 +02:00

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995, 1996, 1997 Spencer Kimball and Peter Mattis
* Copyright (C) 1997 Josh MacDonald
*
* file-open.c
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gegl.h>
#include "libgimpbase/gimpbase.h"
#include "core/core-types.h"
#include "gegl/gimp-babl.h"
#include "core/gimp.h"
#include "core/gimpcontext.h"
#include "core/gimpdocumentlist.h"
#include "core/gimpimage.h"
#include "core/gimpimage-merge.h"
#include "core/gimpimage-undo.h"
#include "core/gimpimagefile.h"
#include "core/gimplayer.h"
#include "core/gimpparamspecs.h"
#include "core/gimpprogress.h"
#include "pdb/gimppdb.h"
#include "plug-in/gimppluginmanager-file.h"
#include "plug-in/gimppluginprocedure.h"
#include "file-import.h"
#include "file-open.h"
#include "file-remote.h"
#include "gimp-file.h"
#include "gimp-intl.h"
static void file_open_sanitize_image (GimpImage *image,
gboolean as_new);
static void file_open_convert_items (GimpImage *dest_image,
const gchar *basename,
GList *items);
static GList * file_open_get_layers (GimpImage *image,
gboolean merge_visible,
gint *n_visible);
static gboolean file_open_file_proc_is_import (GimpPlugInProcedure *file_proc);
/* public functions */
GimpImage *
file_open_image (Gimp *gimp,
GimpContext *context,
GimpProgress *progress,
GFile *file,
GFile *entered_file,
gboolean as_new,
GimpPlugInProcedure *file_proc,
GimpRunMode run_mode,
GimpPDBStatusType *status,
const gchar **mime_type,
GError **error)
{
GimpValueArray *return_vals;
GimpImage *image = NULL;
GFile *local_file = NULL;
gchar *path = NULL;
gchar *entered_uri = NULL;
gboolean mounted = TRUE;
GError *my_error = NULL;
g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
g_return_val_if_fail (GIMP_IS_CONTEXT (context), NULL);
g_return_val_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress), NULL);
g_return_val_if_fail (G_IS_FILE (file), NULL);
g_return_val_if_fail (G_IS_FILE (entered_file), NULL);
g_return_val_if_fail (status != NULL, NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
*status = GIMP_PDB_EXECUTION_ERROR;
/* FIXME enable these tests for remote files again, needs testing */
if (g_file_is_native (file) &&
g_file_query_exists (file, NULL))
{
GFileInfo *info;
info = g_file_query_info (file,
G_FILE_ATTRIBUTE_STANDARD_TYPE ","
G_FILE_ATTRIBUTE_ACCESS_CAN_READ,
G_FILE_QUERY_INFO_NONE,
NULL, error);
if (! info)
return NULL;
if (g_file_info_get_file_type (info) != G_FILE_TYPE_REGULAR)
{
g_set_error_literal (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("Not a regular file"));
g_object_unref (info);
return NULL;
}
if (! g_file_info_get_attribute_boolean (info,
G_FILE_ATTRIBUTE_ACCESS_CAN_READ))
{
g_set_error_literal (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("Permission denied"));
g_object_unref (info);
return NULL;
}
g_object_unref (info);
}
if (! file_proc)
file_proc = gimp_plug_in_manager_file_procedure_find (gimp->plug_in_manager,
GIMP_FILE_PROCEDURE_GROUP_OPEN,
file, error);
if (! file_proc)
{
/* don't bail out on remote files, they might need to be
* downloaded for magic matching
*/
if (g_file_is_native (file))
return NULL;
g_clear_error (error);
}
if (! g_file_is_native (file) &&
! file_remote_mount_file (gimp, file, progress, &my_error))
{
if (my_error)
{
g_printerr ("%s: mounting remote volume failed, trying to download"
"the file: %s\n",
G_STRFUNC, my_error->message);
g_clear_error (&my_error);
mounted = FALSE;
}
else
{
*status = GIMP_PDB_CANCEL;
return NULL;
}
}
if (! file_proc || ! file_proc->handles_uri || ! mounted)
{
gchar *my_path = g_file_get_path (file);
if (! my_path)
{
local_file = file_remote_download_image (gimp, file, progress,
&my_error);
if (! local_file)
{
if (my_error)
g_propagate_error (error, my_error);
else
*status = GIMP_PDB_CANCEL;
return NULL;
}
/* if we don't have a file proc yet, try again on the local
* file
*/
if (! file_proc)
file_proc = gimp_plug_in_manager_file_procedure_find (gimp->plug_in_manager,
GIMP_FILE_PROCEDURE_GROUP_OPEN,
local_file, error);
if (! file_proc)
{
g_file_delete (local_file, NULL, NULL);
g_object_unref (local_file);
return NULL;
}
if (file_proc->handles_uri)
path = g_file_get_uri (local_file);
else
path = g_file_get_path (local_file);
}
g_free (my_path);
}
if (! path)
{
if (file_proc->handles_uri)
path = g_file_get_uri (file);
else
path = g_file_get_path (file);
}
entered_uri = g_file_get_uri (entered_file);
if (! entered_uri)
entered_uri = g_strdup (path);
if (progress)
g_object_add_weak_pointer (G_OBJECT (progress), (gpointer) &progress);
return_vals =
gimp_pdb_execute_procedure_by_name (gimp->pdb,
context, progress, error,
gimp_object_get_name (file_proc),
GIMP_TYPE_RUN_MODE, run_mode,
G_TYPE_STRING, path,
G_TYPE_STRING, entered_uri,
G_TYPE_NONE);
if (progress)
g_object_remove_weak_pointer (G_OBJECT (progress), (gpointer) &progress);
g_free (path);
g_free (entered_uri);
*status = g_value_get_enum (gimp_value_array_index (return_vals, 0));
if (*status == GIMP_PDB_SUCCESS && ! file_proc->generic_file_proc)
image = gimp_value_get_image (gimp_value_array_index (return_vals, 1),
gimp);
if (local_file)
{
if (image)
gimp_image_set_file (image, file);
g_file_delete (local_file, NULL, NULL);
g_object_unref (local_file);
}
if (*status == GIMP_PDB_SUCCESS)
{
if (image)
{
/* Only set the load procedure if it hasn't already been set. */
if (! gimp_image_get_load_proc (image))
gimp_image_set_load_proc (image, file_proc);
file_proc = gimp_image_get_load_proc (image);
if (mime_type)
*mime_type = g_slist_nth_data (file_proc->mime_types_list, 0);
}
else if (! file_proc->generic_file_proc)
{
if (error && ! *error)
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("%s plug-in returned SUCCESS but did not "
"return an image"),
gimp_procedure_get_label (GIMP_PROCEDURE (file_proc)));
*status = GIMP_PDB_EXECUTION_ERROR;
}
}
else if (*status != GIMP_PDB_CANCEL)
{
if (error && ! *error)
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("%s plug-in could not open image"),
gimp_procedure_get_label (GIMP_PROCEDURE (file_proc)));
}
gimp_value_array_unref (return_vals);
if (image)
{
gimp_image_undo_disable (image);
if (file_open_file_proc_is_import (file_proc))
{
file_import_image (image, context, file,
run_mode == GIMP_RUN_INTERACTIVE,
progress);
}
/* Enables undo again */
file_open_sanitize_image (image, as_new);
}
return image;
}
/**
* file_open_thumbnail:
* @gimp:
* @context:
* @progress:
* @file: an image file
* @size: requested size of the thumbnail
* @mime_type: return location for image MIME type
* @image_width: return location for image width
* @image_height: return location for image height
* @format: return location for image format (set to NULL if unknown)
* @num_layers: return location for number of layers
* (set to -1 if the number of layers is not known)
* @error:
*
* Attempts to load a thumbnail by using a registered thumbnail loader.
*
* Return value: the thumbnail image
*/
GimpImage *
file_open_thumbnail (Gimp *gimp,
GimpContext *context,
GimpProgress *progress,
GFile *file,
gint size,
const gchar **mime_type,
gint *image_width,
gint *image_height,
const Babl **format,
gint *num_layers,
GError **error)
{
GimpPlugInProcedure *file_proc;
GimpProcedure *procedure;
g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
g_return_val_if_fail (GIMP_IS_CONTEXT (context), NULL);
g_return_val_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress), NULL);
g_return_val_if_fail (G_IS_FILE (file), NULL);
g_return_val_if_fail (mime_type != NULL, NULL);
g_return_val_if_fail (image_width != NULL, NULL);
g_return_val_if_fail (image_height != NULL, NULL);
g_return_val_if_fail (format != NULL, NULL);
g_return_val_if_fail (num_layers != NULL, NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
*image_width = 0;
*image_height = 0;
*format = NULL;
*num_layers = -1;
file_proc = gimp_plug_in_manager_file_procedure_find (gimp->plug_in_manager,
GIMP_FILE_PROCEDURE_GROUP_OPEN,
file, NULL);
if (! file_proc || ! file_proc->thumb_loader)
return NULL;
procedure = gimp_pdb_lookup_procedure (gimp->pdb, file_proc->thumb_loader);
if (procedure && procedure->num_args >= 2 && procedure->num_values >= 1)
{
GimpPDBStatusType status;
GimpValueArray *return_vals;
GimpImage *image = NULL;
gchar *path = NULL;
if (! file_proc->handles_uri)
path = g_file_get_path (file);
if (! path)
path = g_file_get_uri (file);
return_vals =
gimp_pdb_execute_procedure_by_name (gimp->pdb,
context, progress, error,
gimp_object_get_name (procedure),
G_TYPE_STRING, path,
GIMP_TYPE_INT32, size,
G_TYPE_NONE);
g_free (path);
status = g_value_get_enum (gimp_value_array_index (return_vals, 0));
if (status == GIMP_PDB_SUCCESS &&
GIMP_VALUE_HOLDS_IMAGE_ID (gimp_value_array_index (return_vals, 1)))
{
image = gimp_value_get_image (gimp_value_array_index (return_vals, 1),
gimp);
if (gimp_value_array_length (return_vals) >= 3 &&
G_VALUE_HOLDS_INT (gimp_value_array_index (return_vals, 2)) &&
G_VALUE_HOLDS_INT (gimp_value_array_index (return_vals, 3)))
{
*image_width =
MAX (0, g_value_get_int (gimp_value_array_index (return_vals, 2)));
*image_height =
MAX (0, g_value_get_int (gimp_value_array_index (return_vals, 3)));
if (gimp_value_array_length (return_vals) >= 5 &&
G_VALUE_HOLDS_INT (gimp_value_array_index (return_vals, 4)))
{
gint value = g_value_get_int (gimp_value_array_index (return_vals, 4));
switch (value)
{
case GIMP_RGB_IMAGE:
*format = gimp_babl_format (GIMP_RGB,
GIMP_PRECISION_U8_NON_LINEAR,
FALSE, NULL);
break;
case GIMP_RGBA_IMAGE:
*format = gimp_babl_format (GIMP_RGB,
GIMP_PRECISION_U8_NON_LINEAR,
TRUE, NULL);
break;
case GIMP_GRAY_IMAGE:
*format = gimp_babl_format (GIMP_GRAY,
GIMP_PRECISION_U8_NON_LINEAR,
FALSE, NULL);
break;
case GIMP_GRAYA_IMAGE:
*format = gimp_babl_format (GIMP_GRAY,
GIMP_PRECISION_U8_NON_LINEAR,
TRUE, NULL);
break;
case GIMP_INDEXED_IMAGE:
case GIMP_INDEXEDA_IMAGE:
{
const Babl *rgb;
const Babl *rgba;
babl_new_palette ("-gimp-indexed-format-dummy",
&rgb, &rgba);
if (value == GIMP_INDEXED_IMAGE)
*format = rgb;
else
*format = rgba;
}
break;
default:
break;
}
}
if (gimp_value_array_length (return_vals) >= 6 &&
G_VALUE_HOLDS_INT (gimp_value_array_index (return_vals, 5)))
{
*num_layers =
MAX (0, g_value_get_int (gimp_value_array_index (return_vals, 5)));
}
}
if (image)
{
file_open_sanitize_image (image, FALSE);
*mime_type = g_slist_nth_data (file_proc->mime_types_list, 0);
#ifdef GIMP_UNSTABLE
g_printerr ("opened thumbnail at %d x %d\n",
gimp_image_get_width (image),
gimp_image_get_height (image));
#endif
}
}
gimp_value_array_unref (return_vals);
return image;
}
return NULL;
}
GimpImage *
file_open_with_display (Gimp *gimp,
GimpContext *context,
GimpProgress *progress,
GFile *file,
gboolean as_new,
GObject *monitor,
GimpPDBStatusType *status,
GError **error)
{
return file_open_with_proc_and_display (gimp, context, progress,
file, file, as_new, NULL,
monitor,
status, error);
}
GimpImage *
file_open_with_proc_and_display (Gimp *gimp,
GimpContext *context,
GimpProgress *progress,
GFile *file,
GFile *entered_file,
gboolean as_new,
GimpPlugInProcedure *file_proc,
GObject *monitor,
GimpPDBStatusType *status,
GError **error)
{
GimpImage *image;
const gchar *mime_type = NULL;
g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
g_return_val_if_fail (GIMP_IS_CONTEXT (context), NULL);
g_return_val_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress), NULL);
g_return_val_if_fail (G_IS_FILE (file), NULL);
g_return_val_if_fail (G_IS_FILE (entered_file), NULL);
g_return_val_if_fail (monitor == NULL || G_IS_OBJECT (monitor), NULL);
g_return_val_if_fail (status != NULL, NULL);
image = file_open_image (gimp, context, progress,
file,
entered_file,
as_new,
file_proc,
GIMP_RUN_INTERACTIVE,
status,
&mime_type,
error);
if (image)
{
/* If the file was imported we want to set the layer name to the
* file name. For now, assume that multi-layered imported images
* have named the layers already, so only rename the layer of
* single-layered imported files. Note that this will also
* rename already named layers from e.g. single-layered PSD
* files. To solve this properly, we would need new file plug-in
* API.
*/
if (! file_proc)
file_proc = gimp_image_get_load_proc (image);
if (file_open_file_proc_is_import (file_proc) &&
gimp_image_get_n_layers (image) == 1)
{
GimpObject *layer = gimp_image_get_layer_iter (image)->data;
gchar *basename;
basename = g_path_get_basename (gimp_file_get_utf8_name (file));
gimp_item_rename (GIMP_ITEM (layer), basename, NULL);
gimp_image_undo_free (image);
gimp_image_clean_all (image);
g_free (basename);
}
if (gimp_create_display (image->gimp, image, GIMP_UNIT_PIXEL, 1.0,
monitor))
{
/* the display owns the image now */
g_object_unref (image);
}
if (! as_new)
{
GimpDocumentList *documents = GIMP_DOCUMENT_LIST (gimp->documents);
GimpImagefile *imagefile;
GFile *any_file;
imagefile = gimp_document_list_add_file (documents, file, mime_type);
/* can only create a thumbnail if the passed file and the
* resulting image's file match. Use any_file() here so we
* create thumbnails for both XCF and imported images.
*/
any_file = gimp_image_get_any_file (image);
if (any_file && g_file_equal (file, any_file))
{
/* no need to save a thumbnail if there's a good one already */
if (! gimp_imagefile_check_thumbnail (imagefile))
{
gimp_imagefile_save_thumbnail (imagefile, mime_type, image,
NULL);
}
}
}
/* announce that we opened this image */
gimp_image_opened (image->gimp, file);
}
return image;
}
GList *
file_open_layers (Gimp *gimp,
GimpContext *context,
GimpProgress *progress,
GimpImage *dest_image,
gboolean merge_visible,
GFile *file,
GimpRunMode run_mode,
GimpPlugInProcedure *file_proc,
GimpPDBStatusType *status,
GError **error)
{
GimpImage *new_image;
GList *layers = NULL;
const gchar *mime_type = NULL;
g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
g_return_val_if_fail (GIMP_IS_CONTEXT (context), NULL);
g_return_val_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress), NULL);
g_return_val_if_fail (GIMP_IS_IMAGE (dest_image), NULL);
g_return_val_if_fail (G_IS_FILE (file), NULL);
g_return_val_if_fail (status != NULL, NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
new_image = file_open_image (gimp, context, progress,
file, file, FALSE,
file_proc,
run_mode,
status, &mime_type, error);
if (new_image)
{
gint n_visible = 0;
gimp_image_undo_disable (new_image);
layers = file_open_get_layers (new_image, merge_visible, &n_visible);
if (merge_visible && n_visible > 1)
{
GimpLayer *layer;
g_list_free (layers);
layer = gimp_image_merge_visible_layers (new_image, context,
GIMP_CLIP_TO_IMAGE,
FALSE, FALSE,
NULL);
layers = g_list_prepend (NULL, layer);
}
if (layers)
{
gchar *basename;
basename = g_path_get_basename (gimp_file_get_utf8_name (file));
file_open_convert_items (dest_image, basename, layers);
g_free (basename);
gimp_document_list_add_file (GIMP_DOCUMENT_LIST (gimp->documents),
file, mime_type);
}
else
{
g_set_error_literal (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("Image doesn't contain any layers"));
*status = GIMP_PDB_EXECUTION_ERROR;
}
g_object_unref (new_image);
}
return g_list_reverse (layers);
}
/* This function is called for filenames passed on the command-line
* or from the D-Bus service.
*/
gboolean
file_open_from_command_line (Gimp *gimp,
GFile *file,
gboolean as_new,
GObject *monitor)
{
GimpImage *image;
GimpObject *display;
GimpPDBStatusType status;
gboolean success = FALSE;
GError *error = NULL;
g_return_val_if_fail (GIMP_IS_GIMP (gimp), FALSE);
g_return_val_if_fail (G_IS_FILE (file), FALSE);
g_return_val_if_fail (monitor == NULL || G_IS_OBJECT (monitor), FALSE);
display = gimp_get_empty_display (gimp);
/* show the progress in the last opened display, see bug #704896 */
if (! display)
display = gimp_context_get_display (gimp_get_user_context (gimp));
if (display)
g_object_add_weak_pointer (G_OBJECT (display), (gpointer) &display);
image = file_open_with_display (gimp,
gimp_get_user_context (gimp),
GIMP_PROGRESS (display),
file, as_new,
monitor,
&status, &error);
if (image)
{
success = TRUE;
g_object_set_data_full (G_OBJECT (gimp), GIMP_FILE_OPEN_LAST_FILE_KEY,
g_object_ref (file),
(GDestroyNotify) g_object_unref);
}
else if (status != GIMP_PDB_SUCCESS && status != GIMP_PDB_CANCEL && display)
{
gimp_message (gimp, G_OBJECT (display), GIMP_MESSAGE_ERROR,
_("Opening '%s' failed: %s"),
gimp_file_get_utf8_name (file), error->message);
g_clear_error (&error);
}
if (display)
g_object_remove_weak_pointer (G_OBJECT (display), (gpointer) &display);
return success;
}
/* private functions */
static void
file_open_sanitize_image (GimpImage *image,
gboolean as_new)
{
if (as_new)
gimp_image_set_file (image, NULL);
/* clear all undo steps */
gimp_image_undo_free (image);
/* make sure that undo is enabled */
while (! gimp_image_undo_is_enabled (image))
gimp_image_undo_thaw (image);
/* Set the image to clean. Note that export dirtiness is not set to
* clean here; we can only consider export clean after the first
* export
*/
gimp_image_clean_all (image);
/* Make sure the projection is completely constructed from valid
* layers, this is needed in case something triggers projection or
* image preview creation before all layers are loaded, see bug #767663.
*/
gimp_image_invalidate (image, 0, 0,
gimp_image_get_width (image),
gimp_image_get_height (image));
/* Make sure all image states are up-to-date */
gimp_image_flush (image);
}
/* Converts items from one image to another */
static void
file_open_convert_items (GimpImage *dest_image,
const gchar *basename,
GList *items)
{
GList *list;
for (list = items; list; list = g_list_next (list))
{
GimpItem *src = list->data;
GimpItem *item;
item = gimp_item_convert (src, dest_image, G_TYPE_FROM_INSTANCE (src));
if (g_list_length (items) == 1)
{
gimp_object_set_name (GIMP_OBJECT (item), basename);
}
else
{
gimp_object_set_name (GIMP_OBJECT (item),
gimp_object_get_name (src));
}
list->data = item;
}
}
static GList *
file_open_get_layers (GimpImage *image,
gboolean merge_visible,
gint *n_visible)
{
GList *iter = NULL;
GList *layers = NULL;
for (iter = gimp_image_get_layer_iter (image);
iter;
iter = g_list_next (iter))
{
GimpItem *item = iter->data;
if (! merge_visible)
layers = g_list_prepend (layers, item);
if (gimp_item_get_visible (item))
{
if (n_visible)
(*n_visible)++;
if (! layers)
layers = g_list_prepend (layers, item);
}
}
return layers;
}
static gboolean
file_open_file_proc_is_import (GimpPlugInProcedure *file_proc)
{
return !(file_proc &&
file_proc->mime_types &&
strcmp (file_proc->mime_types, "image/x-xcf") == 0);
}
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